↑ The marriages of knighted Welsh landowners, 1485-1558, in National Library of Wales journal - Cyf. 25, rh. 4 Gaeaf 1988.
p 395 - ... 7 Sir Morgan John (d. 1499 or 1500) of Tredegar m. Margaret (W), d. of Sir Thomas Morgan (d. 1501) of Langston and Pencoed, co, Monmouth (WG 1400-1500, III, 391, 395). ...